CN109952667B - Coating film, battery module and mobile terminal - Google Patents

Abstract

The application provides a covering film, a battery module and a mobile terminal. The covering film includes a wrapping part and a pulling part, and the pulling part and the wrapping part are divided by a tearing line; when the pulling part is pulled, the tearing The broken wire is disconnected, and the pulling part is separated from the wrapping part; on the wrapping surface of the wrapping part, the area wrapping the side wall of the battery is a glue-free area, and other areas have the first adhesive; the adhesive surface of the wrapping part has a second adhesive. Glue; part of the wrapping surface of the lifting part has a third adhesive; the bonding surface of the lifting part is a glue-free area. In the above-mentioned embodiment, the covering film is made of an integral structure, and the covering film is divided into two different areas by the tearing line. The pulling part can separate the pulling part from the wrapping part and pull the battery out of the battery compartment, thereby facilitating the disassembly of the battery and the production and processing of the wrapping film.

Description

A covering film, battery module and mobile terminal

technical field

The present application relates to the technical field of mobile terminals, and in particular, to a covering film, a battery module and a mobile terminal.

Background technique

The battery is an essential product of the mobile terminal. In the prior art, the battery needs to be placed in the battery compartment of the mobile terminal, and the battery needs to be fixed. There are many ways to fix the battery in the prior art, as shown in Figure 1 As shown, the fixing method in FIG. 1 adopts the tape 3 solution, that is, the battery 2 is bonded to the battery compartment 1 through the tape 3, and the bonding strength is high. However, in this method, the battery 2 is not easy to be disassembled during the repairing process, and tools are needed, and the package of the battery 2 is easily damaged during the disassembly process, causing a potential safety hazard.

There is also a fixing method using the easy-to-pull tape 4 as shown in FIG. 2, that is, the battery 2 is bonded to the battery compartment 1 through the easy-to-pull tape 4. When the battery 2 is removed, pull the handle 7 of the easy-to-pull tape 4, and the easy-to-pull tape 4 is in the The viscosity decreases during the stretching process, and the battery 2 is removed after pulling out. However, the pull-out yield of the easy-to-pull tape 4 is greatly affected by the thickness of the tape itself and the pull-out angle, which requires the structural design of the battery compartment 1; compared with the adhesive-backed solution, the cost is high.

There is also a battery wrapping solution as shown in FIG. 3 , the battery 2 is packaged by a detachable wrapping film 5, and a handle structure 6 is added to the battery 2, which is bonded to the battery compartment 1 by an ordinary tape 3; when removing the battery 2, open the After the detachable wrapping film 5 is removed, the handle structure 6 is pulled up, the battery 2 is separated from the detachable wrapping film 5, and the battery 2 is taken out. However, when this method is adopted, the detachable wrapping film 5 is separated from the handle structure 6, the production process and the mounting process are complicated, and the cost is high.

SUMMARY OF THE INVENTION

The present application provides a coating film, a battery module and a mobile terminal to provide a convenient battery disassembly structure.

In a first aspect, a covering film is provided, the covering film includes a wrapping part and a pulling part, and the pulling part and the wrapping part are divided by a tearing line; when pulling the pulling part When the part is opened, the tearing line is disconnected, and the pulling part is separated from the wrapping part;

The coating film has a wrapping surface facing the battery and an adhesive surface facing the battery compartment; wherein,

On the wrapping surface of the wrapping portion, the area wrapping the side wall of the battery is an adhesive-free area, and the second area except the adhesive-free area has the first adhesive;

The bonding surface in the wrapping portion has a second bonding glue, and the bonding force of the first bonding glue is smaller than the bonding force of the second bonding glue;

A part of the wrapping surface of the pulling part has a third adhesive; the adhesive surface of the pulling part is a glue-free area.

In the above-mentioned embodiment, the covering film is made of an integral structure, and the covering film is divided into two different regions by the tearing line. The pulling part can separate the pulling part from the wrapping part and pull the battery out of the battery compartment, thereby facilitating the disassembly of the battery and facilitating the production and processing of the wrapping film.

In a specific embodiment, the third adhesive is the same as the first adhesive.

In a specific embodiment, the third adhesive is different from the first adhesive, and the adhesive force of the third adhesive is greater than the adhesive force of the first adhesive. Due to the difference in adhesive force, the adhesive force between the pulling part and the battery is greater than the adhesive force between the wrapping part and the battery, which further ensures the smooth pulling out of the battery.

In a specific embodiment, there are two tearing lines, the two tearing lines are arranged in parallel, a through hole is formed on the covering film, and each tearing line extends to the through hole. The two tearing lines and the through holes are provided, so that the pulling part can be separated from the wrapping part when being stressed, so that the battery can be pulled out.

In a specific embodiment, the tearing line is one, the tearing line is U-shaped, and both ends of the tearing line extend to the same side of the coating film. By setting the U-shaped tearing line, the pulling part can be separated from the wrapping part when being stressed, so that the battery can be pulled out.

In a specific embodiment, one side of the cladding film has a raised portion extending to the outside of the side edge of the covering film; and the tearing line extends to the raised portion.

In a specific embodiment, the edge position of the raised portion is provided with a notch connected with each tearing line. It is convenient for the lifting part to be separated from the wrapping part.

In a specific embodiment, the part of the pulling part extending into the convex part is a glue-free area. It is convenient to remove the battery.

In a specific embodiment, the lift portion is located outside the raised portion. It is convenient to apply force to the pulling part, thereby facilitating the disassembly of the battery.

In a specific embodiment, the glue-free area on the wrapping surface divides the first adhesive glue into three parallel areas. Improved wrapping effect.

In a specific embodiment, the tear line is a double layer tear line. It is convenient for the lifting part to be separated from the wrapping part.

In a specific embodiment, a protective film is attached to the adhesive surface of the coating film. to protect the second adhesive.

In a specific embodiment, a plurality of bonding areas are provided in the bonding surface of the coating film, and each bonding area has the second adhesive glue. Improve the bonding effect.

In a specific embodiment, the pulling part is arranged in the middle position of one side of the covering film. Easy to pull out the battery.

In a specific embodiment, the pulling part spans the side wall of the battery, and one side of the side wall of the battery is a glue-free area, and the other side is a glue-free area.

In a second aspect, a battery module is provided, the battery module includes a battery and any one of the above-mentioned coating films wrapping the battery.

In the above-mentioned embodiment, the covering film is made of an integral structure, and the covering film is divided into two different regions by the tearing line. The pulling part can separate the pulling part from the wrapping part and drive the battery to be pulled out from the battery compartment, thereby facilitating the disassembly of the battery and the production and processing of the wrapping film.

In a third aspect, a mobile terminal is provided, the mobile terminal includes a casing, a battery compartment disposed in the casing, and a battery fixed in the battery compartment, the battery being wrapped with any of the above the described coating.

In the above-mentioned embodiment, the covering film is made of an integral structure, and the covering film is divided into two different regions by the tearing line. The pulling part can separate the pulling part from the wrapping part and drive the battery to be pulled out from the battery compartment, thereby facilitating the disassembly of the battery and the production and processing of the wrapping film.

Description of drawings

1 is a schematic diagram of battery installation in the prior art;

2 is a schematic diagram of battery installation in the prior art;

3 is a schematic diagram of battery installation in the prior art;

4 is a schematic diagram of the wrapping surface of the wrapping film provided in the embodiment of the present application;

FIG. 5 is a schematic diagram of an adhesive surface of a coating film provided in an embodiment of the present application;

6 is a schematic structural diagram of another coating film provided in an embodiment of the present application;

FIG. 7 is a reference diagram of the use state of the coating film provided by the embodiment of the present application;

FIG. 8 is a schematic structural diagram of a battery module provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

4 and 7 . FIG. 4 shows the structure of the coating film provided by the embodiment of the present application when it is not in use, and FIG. 7 shows the coating film of the embodiment of the present application when the battery is wrapped. Schematic diagram of the cooperation with the battery.

In order to facilitate the understanding of the coating films provided in the embodiments of the present application, the four surfaces of the battery 20 except for the surfaces at both ends are firstly named. On the first surface (shown in the figure), the surface facing away from the first surface is the second surface 21 , and the two surfaces adjacent to the first surface and the second surface are the side surfaces.

Referring first to FIG. 4 and FIG. 5 , the covering film 10 provided in the embodiment of the present application adopts an integrated structure, and the covering film 10 has two opposite surfaces, which are the bonding surface and the wrapping surface respectively; wherein, as shown in FIG. 4 The outgoing surface is the wrapping surface, the wrapping surface is the side facing the battery 20 when the wrapping film 10 wraps the battery 20, the surface shown in FIG. 5 is the adhesive surface, and the adhesive surface is the side away from the wrapping surface, And when the battery 20 is placed in the battery compartment, the adhesive surface faces the battery compartment and is used for bonding with the battery compartment.

After introducing the relative relationship between the bonding surface and the coating surface of the coating film 10, the following describes the regional structure of the coating film 10. It should be understood that the structure of each region divided on the coating film 10 is as follows: The solid structure on the covering film 10, the solid structure divided on the covering film 10 is: the wrapping part 11 and the pulling part 12, wherein the wrapping part 11 has two sides, and the two sides are the covering film respectively 10 bonding surface and wrapping surface. The pulling part 11 has two surfaces, and the two surfaces are the adhesive surface and the wrapping surface of the covering film 10 , respectively.

Referring to the covering film 10 in FIG. 4 , the covering film 10 of the battery 20 provided in this embodiment of the present application is divided into a wrapping part 11 and a pulling part 12 , wherein the wrapping part 11 is used to wrap the battery 20 and lift the battery 20 . The pull portion 12 is used as an action area for external force when the battery 20 is taken out. The wrapping film 10 is provided with a tearing line 14 for distinguishing two regional structures, and the tearing line 14 is carved on the wrapping film 10 to separate the wrapping portion 11 from the pulling portion 12 . And the tearing line 14 forms a partially disconnected and partially connected structure between the pulling portion 12 and the wrapping portion 11. When the pulling portion 12 is pulled by an external force, the tearing line 14 is disconnected, so that the wrapping portion 11 and the lifting portion 11 are disconnected. The pull portion 12 can be broken and formed into two separate structures.

When the wrapping film 10 is connected to the battery 20, the wrapping surface of the wrapping portion 11 is provided with a first adhesive (not numbered in the figure), and the wrapping portion 11 is bonded to the battery 20 through the first adhesive, so that The wrapping portion 11 can be wrapped on the battery 20. In addition, when taking out the battery 20, in order to facilitate the separation of the wrapping film 10 from the battery 20, the wrapping surface of the wrapping portion 11 is used to wrap the two sides of the battery 20. Glue-free areas, such as the shaded areas on wrap 11 shown in FIG. 4 . A second area other than the glue-free area has a first adhesive. When the coating film 10 wraps the battery 20 , the adhesive-free area is not bonded to the battery 20 , so that the coating film 10 can be separated from the battery 20 . The wrapping surface of the pulling portion 12 is also partially provided with a third adhesive to ensure that when the wrapping portion 11 wraps the battery 20, the pulling portion 12 can be bonded to the battery 20, so that when the pulling portion 12 is pulled, it can drive the battery 20. battery 20.

When the coating film 10 that wraps the battery 20 is put into the battery compartment, the adhesive surface of the coating film 10 has a second adhesive, and the coating film 10 is adhered to the bottom surface of the battery compartment through the second adhesive. connect. In specific setting, the adhesive force of the first adhesive glue is smaller than the adhesive force of the second adhesive glue. In this way, when the battery 20 is taken out, the coating film 10 can be adhered in the battery compartment, and will not be pulled out together with the battery 20 . In addition, in order to facilitate the pulling of the battery 20, the adhesive surface in the pulling portion 12 is a glue-free area, so that when the coating film 10 is fixed to the battery compartment, the pulling portion 12 will not be adhered to the bottom surface of the battery compartment, thereby facilitating pulling. Pulling part 12 .

It can be seen from the above description that the covering film 10 provided in the embodiment of the present application is formed of an integral structure, and the covering film 10 is divided into two different areas by the tearing line 14. When the battery 20 needs to be disassembled, only The pulling portion 12 divided by the tear line 14 needs to be pulled to separate the pulling portion 12 from the wrapping portion 11 , and the battery 20 can be pulled out from the battery compartment, thereby facilitating the disassembly of the battery 20 .

In order to understand in detail the specific structure and principle of the coating film 10 provided by the embodiments of the present application, it will be described in detail below with reference to the specific drawings.

Referring first to FIG. 4 and FIG. 5 , the covering film 10 provided in the embodiment of the present application is an integrally formed film body, and the film body includes two opposite surfaces, which are the wrapping surface and the bonding surface, respectively, wherein, as shown in FIG. 4 As shown, the wrapping surface is divided into: the first surface wrapping area 111 that is attached to the first surface of the battery 20 according to the function of the wrapped battery 20; the side wrapping area 112 that is attached to the two sides; As shown in FIG. 8, the two second surface wrapping areas 113 partially wrap the second surface 21 of the battery 20; as shown in FIG. 5, the bonding surface is only in contact with the first surface wrapping area 111. The first surface bonding area 114 is set in the opposite area, and the other areas on the bonding surface are glue-free areas.

According to the function, the covering film 10 is divided into two parts, namely the wrapping part 11 and the pulling part 12, and the wrapping part 11 and the pulling part 12 are divided into two parts by the tearing line 14. In the embodiment, the tearing line 14 is a double-layer tearing line. The tearing line 14 as shown in FIG. 4 is a double-layer tearing line. The pulling part 12 is separated from the wrapping part 11 . When the tearing line 14 is not broken, the wrapping portion 11 and the pulling portion 12 are integrally formed. When the tearing line 14 is disconnected, the wrapping portion 11 and the pulling portion 12 are separated, and the wrapping portion 11 remains in the battery compartment. The pulling part 12 is connected to the battery 20 and pulls the battery 20 out of the wrapping part 11 .

In order to ensure that the pulling part 12 and the wrapping part 11 can be separated, two different structural modes are adopted in the covering film 10 provided in the embodiment of the present application, one of which is shown in FIG. 4 . Two tearing lines 14 separate both sides of the pulling part 12 from the wrapping part 11, and a through hole 15 is also provided on the covering film 10, and each tearing line 14 extends to the through hole 15, so as to pass through the two A tear line 14 and a through hole 15 distinguish the pulling portion 12 from the wrapping portion 11 . In the specific setting, the two tearing lines 14 are arranged in parallel or approximately parallel, and the end of each tearing line 14 extends to the same side of the covering film 10, as shown in FIG. 4, the tearing One end of the wire 14 is located in the through hole 15, and the other end is located at the edge of the coating film 10, and the divided wrapping part 11 forms a concave-shaped structure, and the pulling part 12 is inserted into the concave part of the wrapping part 11. structure. When in use, the pulling part 12 is pulled, and the two tearing lines 14 are disconnected. When the tearing lines 14 are disconnected to the position of the through hole 15 , the pulling part 12 is separated from the wrapping part 11 .

In another way, as shown in FIG. 6 , the tearing line 14 is one, and its shape is U-shaped, and both ends of the U-shaped tearing line 14 extend to the same side of the coating film 10 , so that the A portion of the film 10 is divided to form the pulling portion 12 . When in use, the pulling part 12 is pulled, the tearing line 14 is gradually disconnected, and when the tearing line 14 is completely disconnected, the pulling part 12 is disconnected from the wrapping part 11 . It should be understood that although a U-shaped tear line 14 is provided in the embodiment of the present application, other shapes of the tear line 14 can also be applied in the embodiment of the present application, as long as the tear line can be guaranteed 14 It only needs to be able to distinguish the pulling part 12 from the wrapping part 11 when it is torn. If the tearing line 14 is a fold line, and the tearing line 14 is surrounded by two parallel tearing lines 14 and a V-shaped tearing line 14 to form the pulling portion 12, it can also be applied to the embodiments of the present application. .

It can be seen from the above description that the pulling portion 12 can be divided in different ways, and when the pulling portion 12 is divided, the pulling portion 12 can be located at different positions on one side of the coating film 10, as shown in FIG. 3 . The shown placement direction of the covering film 10 is the reference direction, and the pulling part 12 can be close to the upper part of the covering film 10 or the lower part of the covering film 10, but in a specific embodiment, the pulling part 12 It is arranged in the middle position of one side of the covering film 10 , and at this time, the adhesive force on both sides of the pulling part 12 is relatively uniform, so that the battery 20 can be easily pulled out of the covering film 10 .

In the wrapping portion 11 and the pulling portion 12 described above, the wrapping portion 11 needs to be connected to the battery 20 and the battery compartment respectively, while the pulling portion 12 only needs to be connected to the battery 20 . The connection between the wrapping part 11 and the pulling part 12 and the battery 20 and the battery compartment will be described in detail below.

First, for the wrapping portion 11 , as shown in FIGS. 4 and 6 , the adhesive-free area on the wrapping surface divides the first adhesive glue into three parallel areas. Specifically, in the wrapping surface of the wrapping portion 11 , the first surface wrapping area 111 and the two second surface wrapping areas 113 are respectively provided with first adhesive glue, and the side wrapping area 112 is a glue-free area, so that the wrapping portion 112 is not glued. When the wrapping surface on 11 wraps the battery 20, the wrapping portion 11 is respectively adhesively connected to the first surface and the second surface 21 of the battery 20, as shown in FIG. 7 and FIG. When the surface wrapping area 111 is bonded to the battery 20, at this time, the second surface wrapping area 113 is located on both sides of the battery 20 respectively. As shown in FIG. 8, when the second surface wrapping area 113 wraps the battery 20, the second surface wrapping area 113 The surface wrapping area 113 wraps only part of the edges of both sides of the second surface 21 . In addition, since the side wrapping area 112 is an adhesive-free area, when the battery 20 is wrapped with the wrapping surface, the side wrapping area 112 will not be bonded to the side of the battery 20 , so that the battery 20 can be removed from the wrapping film 10 more easily. pull out. For the bonding surface located in the wrapping portion 11 , except for the first surface bonding region 114 where the second bonding glue is provided, the remaining regions are glue-free regions. When the battery 20 wrapped with the coating film 10 is fixed in the battery compartment, the second adhesive glue provided on the bonding surface of the coating film 10 is bonded and connected to the bottom wall of the battery compartment. During the specific setting of the glue, a plurality of bonding areas 115 are provided in the bonding surface of the coating film 10 , and each bonding area 115 has a second bonding glue. As shown in FIG. 5 , a plurality of adhesive areas 115 arranged in a single row are formed, and when there are adhesive areas 115 across the tearing line 14 , the adhesive areas 115 are interrupted to prevent the pulling part 12 from being glued.

Wherein, the glue can be applied to the surface of the bonding area 115 by coating, or other known methods can be used to apply glue (such as double-sided tape), as long as it is ensured that the bonding area 115 can have a connection with the battery compartment. Other methods of adhesion may be used in embodiments of the present invention.

For the pulling part 12, the pulling part 12 is only connected to the battery 20, and the first surface bonding area 114 on the pulling part 12 is a glue-free area, that is, as shown in FIG. The tear line 14 is interrupted so as to avoid glue sticking to the pull-up portion 12 . In addition, in order to connect the pulling portion 12 to the battery 20, a third adhesive is provided on the upper portion of the pulling portion 12. As shown in FIG. 4, the wrapping surface of the pulling portion 12 is at least partially provided with a third adhesive glue. In the lifting portion 12 provided in the embodiment of the present application, when the coating film 10 wraps the battery 20, the lifting portion 12 spans the side wall of the battery 20 and is in contact with the first surface, one side surface and the second surface 21 of the battery 20, respectively. And the area on one side of the side wall of the battery 20 in the pulling part 12 is a glue-free area (the shaded area on the pulling part 12 as shown in FIG. 4 ), and the area on the other side is a glued area, that is, the The first surface wrapping area 111 on the pulling part 12 has a first adhesive and a third adhesive adhesive, and the side wrapping area 112 and the second surface wrapping area 113 of the pulling part 12 are glue-free areas. When this structure is adopted, since the edge of the pulling portion 12 is not adhered to the battery 20, the pulling portion 12 can be easily pulled up.

Meanwhile, when the above structure is adopted, it should be able to ensure that the pulling part 12 and the first surface of the battery 20 have a sufficient bonding area to withstand the pulling force when the battery 20 is pulled out. Wherein, the third adhesive can be the same as the first adhesive. Further, the third adhesive is different from the first adhesive. When the third adhesive is different from the first adhesive, the adhesive force of the third adhesive is greater than the adhesive force of the first adhesive. In this way, the adhesion between the pulling part 12 and the battery 20 is greater than the adhesion between the wrapping part 11 and the battery 20 , which further ensures that the pulling part 12 can pull the battery 20 out of the covering film 10 smoothly.

In order to facilitate the separation of the pulling part 12 from the wrapping part 11 , in the embodiment of the present application, the structure of the covering film 10 on the side where the pulling part 12 is located is improved, as shown in FIGS. 4 and 6 , One side of the covering film 10 has a raised portion 13 extending outside the side of the covering film 10; the tear line 14 is extended to the raised portion 13, wherein a part of the raised portion 13 belongs to the covering portion 11, and the other part belongs to the covering portion 11. It belongs to the pulling part 12 , and on the bulging part 13 , a notch 131 connected to each tearing line 14 is provided at the edge position of the bulging part 13 . When the pulling part 12 needs to be pulled, the positional strength of the provided notch 131 is relatively low, so as to facilitate the separation of the pulling part 12 from the wrapping part 11 . And more preferably, the pulling part 12 extends to the outside of the raised part 13 to form a convex-shaped structure. As shown in FIG. 8 , the part of the pulling part 12 extending to the raised part 13 can be used as a pulling When the pulling part 12 is not separated from the wrapping part 11 in the force-bearing area of the part 12, the pulling part 12 is pulled by holding the area protruding from the pulling part 12 to the convex part 13, so as to connect the pulling part 12 to the wrapping part 11. Part 11 is separated, and battery 20 is pulled out.

It can be seen from the above description that by setting the structure of the pulling portion 12 protruding to the convex portion 13, the pulling portion 12 can be easily pulled. In addition, it is more convenient to pull up the pulling portion 12. The portion inside the raised portion 13 is a glue-free area.

It should be understood that, when the coating film 10 is not wrapped on the battery 20, in order to prevent the first adhesive and the second adhesive from adhering to impurities, preferably, the adhesive surface of the coating film 10 is A protective film (not shown) is attached to protect the second adhesive. Similarly, a protective film is also attached to the wrapping surface of the wrapping film 10 to protect the first adhesive.

In addition, in order to ensure that the coating film 10 can remain in the battery compartment when the battery 20 is pulled out, when the first adhesive and the second adhesive are selected, the adhesive force of the first adhesive is smaller than that of the second adhesive. Adhesion of glue. Moreover, the first adhesive glue and the second adhesive adhesive can be commonly used glues in the prior art, such as hot melt adhesives.

It can be seen from the above description that the coating film 10 provided in the embodiment of the present application is manufactured in the form of an integrated structure, and the prepared coating film 10 has the functions of wrapping the battery 20 and disassembling the battery 20 , which is the same as the wrapping film shown in FIG. 3 . Compared with the structure of disassembling the battery 20, the structure is simplified and the cost is reduced.

As shown in FIG. 8 , an embodiment of the present application further provides a battery 20 module, where the battery 20 module includes a battery 20 and a coating film 10 that wraps any of the above-mentioned batteries 20 .

In the above embodiment, when wrapping the battery 20 , the protective film on the wrapping film 10 needs to be peeled off, and after that, the battery 20 is bonded to the battery 20 by the first adhesive, and the battery 20 is wrapped. The covering film 10 is made of an integral structure, and the covering film 10 is divided into two different areas by the tearing line 14. When the battery 20 needs to be disassembled, it is only necessary to pull the part divided by the tearing line 14. The pulling portion 12 can separate the pulling portion 12 from the wrapping portion 11 and drive the battery 20 to be pulled out from the battery compartment, thereby facilitating the disassembly of the battery 20 and the production and processing of the wrapping film 10 .

The embodiments of the present application also provide a mobile terminal, where the mobile terminal may be a common mobile phone, a tablet computer, or a notebook computer. The mobile terminal includes a casing, a battery compartment disposed in the casing, and a battery 20 fixed in the battery compartment. The battery 20 is wrapped with any one of the above-mentioned coating films 10 .

In the above embodiment, when wrapping the battery 20 , the protective film on the wrapping film 10 needs to be peeled off, and after that, the battery 20 is bonded to the battery 20 by the first adhesive, and the battery 20 is wrapped. When installing the battery 20 module into the battery compartment, the protective film on the coating film 10 that protects the second adhesive needs to be uncovered, and then the battery 20 module is put into the battery compartment, and the second adhesive is bonded to the battery compartment. The bottom wall of the battery compartment is adhesively connected. In the above solution, the covering film 10 is made of an integral structure, and the covering film 10 is divided into two different areas by the tearing line 14. When the battery 20 needs to be disassembled, it is only necessary to pull through the tearing line 14. The divided pulling portion 12 can separate the pulling portion 12 from the wrapping portion 11 and drive the battery 20 to be pulled out of the battery compartment, thereby facilitating the disassembly of the battery 20 and the production and processing of the wrapping film 10 .

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or replacements, which should cover within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (13)

1. The coating film is characterized by comprising a wrapping part and a lifting part, wherein the lifting part and the wrapping part are divided by a tearing line; when the pulling part is pulled, the tearing line is broken, and the pulling part is separated from the wrapping part;

the wrapping film is provided with a wrapping surface facing the battery and an adhesive surface facing the battery bin; wherein,

on the wrapping surface of the wrapping part, the area wrapping the side wall of the battery is a glue-free area, and a second area except the glue-free area is provided with first bonding glue;

the bonding surface of the wrapping part is provided with second bonding glue, and the bonding force of the first bonding glue is smaller than that of the second bonding glue;

a part of the wrapping surface of the lifting part is provided with third bonding glue; the bonding surface of the lifting part is a glue-free area;

one side of the cladding film is provided with a convex part extending out of the side edge of the cladding film; the tear line extends outward to the boss.

2. The cover film as claimed in claim 1, wherein the two tear lines are arranged in parallel, and the cover film is provided with through holes, each tear line extending to the through hole.

3. The cover of claim 1, wherein the tear line is one, the tear line is U-shaped, and both ends of the tear line extend to the same side of the cover.

4. The cover of claim 1, wherein the edge of the tab is provided with a notch in communication with each tear line.

5. The cover film as claimed in claim 4, wherein the portion of the lifting portion extending into the raised portion is a glue-free zone.

6. The coated film according to any one of claims 1 to 5, wherein the pulling portion is located outside the convex portion.

7. The coated film according to any one of claims 1 to 5, wherein the adhesive-free area on the wrapping surface divides the first adhesive glue into three parallel areas.

8. The coated film according to any one of claims 1 to 5, wherein the tear line is a double-layer tear line.

9. The coating film according to any one of claims 1 to 5, wherein a protective film is attached to an adhesive surface of the coating film.

10. The coating film according to any one of claims 1 to 5, wherein the third adhesive glue is the same as the first adhesive glue.

11. The coating film according to any one of claims 1 to 5, wherein the third adhesive is different from the first adhesive, and an adhesive force of the third adhesive is larger than an adhesive force of the first adhesive.

12. A battery module comprising a battery and the coating film according to any one of claims 1 to 11 covering the battery.

13. A mobile terminal is characterized by comprising a shell, a battery compartment arranged in the shell, and a battery fixed in the battery compartment, wherein the battery is wrapped with the wrapping film according to any one of claims 1-11.

Images